US4687693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesively mountable die attach film
Assignee: Ingredion Inc
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Filing: 1985-06-13
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Granted: 1987-08-18
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Expires: 2005-06-13
Abstract
Abstract The present invention is a die attach film which is adapted for adhesive mounting to a dicing frame. The film contains a support film, a curable die bonding adhesive releasably mounted on the support film which is adapted to receive semiconductor wafer, semiconductor die, and the like, and adhesive means to bond the support film to a dicing frame. In one embodiment the adhesive means comprise pressure sensitive adhesive means on the support film itself adjacent the portions designed to contact the dicing frame. In another embodiment, the adhesive means comprise a larger tacky film bonded to the bottom of the support film for the die attach film.
Inventors
- 👤 Gregory M. Sheyon
- 👤 Joseph A. Aurichio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:58
CPC Classifications
B; B29; B29C; B29C65/00; H; H10; H10P; H10P72/00; H10P72/70; H10P72/74; H10P72/7402; H10P50/00; H10P54/00; H10P72/7416; H10W; H10W72/00; H10W72/01; H10W72/013; H10W72/01331; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/07338; H10W72/30; H10W72/351; H10W72/353; H10W72/354; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413; Y10T428/24802; Y10T428/24926
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
A die attach film adapted for adhesive mounting to a dicing frame, when the frame is brought into contact with the film, which comprises: (a) a support film; (b) a curable die bonding adhesive releasably mounted on the support film; and (c) adhesive means to bond the support film to a dicing frame, said adhesive means comprising a larger tacky film to which the support film carrying the adhesive (b) is bonded.
Claim 2
Dependent Claim
72 words
A die attach film adapted for adhesive mounting to a dicing frame, when the frame is brought into contact with the film, which comprises: (a) a support film; (b) a curable die bonding adhesive releasably mounted on the support film; and (c) adhesive means to bond the support film to a dicing frame, said adhesive means comprising a larger tacky film to which the support film carrying the adhesive (b) is bonded.
Claim 3
Dependent Claim
31 words
A film as claimed in claim 1 wherein the die bonding adhesive is adapted to support a semiconductor wafer for dicing, when the wafer is brought into contact with the adhesive.
Claim 4
Dependent Claim
34 words
A film as claimed in claim 1 wherein the die bonding adhesive is adapted to support a semiconductor die after it has been diced, when the die is brought into contact with the adhesive.
Claim 5
Dependent Claim
15 words
A film as claimed in claim 1 wherein the die bonding adhesive is electrically conductive.
Claim 6
Dependent Claim
17 words
A film as claimed in claim 2 wherein the die bonding adhesive comprises an electrically conductive adhesive.
Claim 7
Dependent Claim
37 words
A film as claimed in claim 1 wherein the portion of the tacky film under the die bonding adhesive adapted to support the wafer, when the wafer is brought into contact with the adhesive, has been removed.
Claim 8
Dependent Claim
11 words
In combination, a dicing frame and the film of claim 1.
Claim 9
Dependent Claim
11 words
In combination, a dicing frame and the film of claim 2.
Claim 10
Dependent Claim
11 words
In combination, a dicing frame and the film of claim 4.
Claim 11
Dependent Claim
11 words
In combination, a dicing frame and the film of claim 5.
Claim 12
Dependent Claim
11 words
In combination, a dicing frame and the film of claim 6.
Claim 13
Dependent Claim
18 words
A film as claimed in claim 1 which further comprises a release covering to protect the adhesive (b).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |